Octal Numbers
Counting
Count from zero to sixteen in octal.
Do NOT use a lookup table or
calculator to determine answers.
When finished, use a octal calculator
to check answers.
| Decimal | Octal |
| 0 | 0 |
| 1 | ? |
| 2 | ? |
| 3 | ? |
| 4 | ? |
| 5 | ? |
| 6 | ? |
| 7 | ? |
| 8 | ? |
| 9 | ? |
| 10 | ? |
| 11 | ? |
| 12 | ? |
| 13 | ? |
| 14 | ? |
| 15 | ? |
| 16 | ? |
Column Values
Write both the exponent and actual decimal value (e.g., 80 = 1)
for the first eight columns of octal.
Do NOT use a lookup table or
calculator to determine answers.
When finished, use a octal calculator
to check answers.
| Position | 8th | 7th | 6th | 5th | 4th | 3rd | 2nd | 1st |
| Power | ? | ? | ? | ? | ? | ? | ? | 80 |
| Value | ? | ? | ? | ? | ? | ? | ? | 1 |
Converting from Octal to Decimal
Convert the following octal numbers to decimal.
Do NOT use a lookup table
or calculator to determine answers.
When finished, use a octal
calculator to check answers.
| Octal | Decimal |
| 5 | ? |
| 10 | ? |
| 17 | ? |
| 23 | ? |
| 77 | ? |
| 153 | ? |
| 1147 | ? |
| 7700 | ? |
Converting from Octal to Binary
Convert the following octal numbers to binary.
Do NOT use a lookup table
or calculator to determine answers.
When finished, use a octal
calculator to check answers.
| Octal | Binary |
| 3 | ? |
| 7 | ? |
| 15 | ? |
| 26 | ? |
| 77 | ? |
| 200 | ? |
| 377 | ? |
| 400 | ? |
Converting from Binary to Octal
Convert the following binary numbers to octal.
Do NOT use a lookup table
or calculator to determine answers.
When finished, use a octal
calculator to check answers.
| Binary | Octal |
| 010 | ? |
| 111 | ? |
| 1101 | ? |
| 101111 | ? |
| 1011010 | ? |
| 10010110 | ? |
| 11111111 | ? |
| 100100000001 | ? |
| 101010101010101 | ? |